Acute Kidney Injury and Renal Documentation Flashcards
7 cards from real CCDS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Acute Kidney Injury and Renal Documentation flashcards as text
Which CKD stage corresponds to a GFR of 15–29 mL/min/1.73m²?
Answer: Stage 4
CKD Stage 4 is defined by a GFR of 15–29 mL/min/1.73m², representing severely decreased kidney function approaching end-stage disease.
Which ICD-10-CM code is assigned for end-stage renal disease (ESRD) requiring renal replacement therapy?
Answer: N18.6
N18.6 is the specific ICD-10-CM code for ESRD, which is distinct from N18.5 (CKD Stage 5) and indicates dependency on dialysis or other renal replacement therapy.
A patient with type 2 diabetes mellitus is documented with CKD Stage 3b. What is the correct ICD-10-CM coding approach?
Answer: Assign E11.22 for diabetic chronic kidney disease plus N18.32 for the specific CKD stage
ICD-10-CM requires E11.22 (type 2 DM with diabetic CKD) paired with N18.32 (CKD Stage 3b) to capture both the diabetic etiology and the specific stage of CKD.
According to ICD-10-CM guidelines, what relationship is assumed between hypertension and chronic kidney disease when both are documented?
Answer: A causal relationship is assumed, requiring combination codes from category I12
ICD-10-CM presumes a causal relationship between hypertension and CKD, requiring combination codes from category I12 without explicit provider documentation of causality.
What does the clinical term 'acute-on-chronic kidney disease' indicate for ICD-10-CM coding purposes?
Answer: AKI superimposed on pre-existing CKD, requiring codes for both conditions
Acute-on-chronic kidney disease indicates AKI has developed in a patient with underlying CKD; ICD-10-CM requires assigning codes for both AKI (N17.x) and the appropriate CKD stage (N18.x).
Which laboratory finding is most consistent with pre-renal acute kidney injury?
Answer: BUN-to-creatinine ratio greater than 20:1
A BUN-to-creatinine ratio >20:1 reflects intact tubular function with avid urea reabsorption, characteristic of pre-renal AKI where kidneys respond to reduced perfusion.
When reviewing a medical record, which finding would most prompt a CDI specialist to initiate a query for a renal diagnosis?
Answer: Documentation of 'elevated creatinine' without any corresponding renal diagnosis
When 'elevated creatinine' is documented without a corresponding coded renal diagnosis, CDI specialists have an opportunity to query for AKI or CKD if clinical criteria are met.